French, U.S. presidents have personal chemistry, but differences on issues including climate change and Iranian nuclear pact remain wide

WASHINGTON—French President Emmanuel Macron arrived for the first state visit of Donald Trump’s presidency, in a test of whether personal chemistry between the two leaders can bridge a yawning policy divide.

The three-day trip is choreographed to showcase the bonhomie that has unexpectedly blossomed between the men over the past year. On Monday, the leaders and their wives planned to dine privately at Mount Vernon, the plantation house of George Washington, followed on Tuesday by talks and a glitzy state dinner at the White...